Glimpse is useful for putting your skills back in the deck for practice makes perfect, and drawing cards again for the dream serum. You can also put your research cards back in, if you threw them during upkeep instead of discovered them during search. If you play this as Harvey, whose deck this came in, it automatically draws you two cards, while letting you put things in your deck that you can’t afford and hopefully getting things that will help you now. Combine with calling in favors to replace your damaged Miskatonic friends. Or try and draw your weakness while someone has Delay the inevitable or dark insight ready.

Plus, even if you have the perfect hand, two book icons will always be useful as seeker.

An under valued card for off class seekers. Off class seekers tend to have fair to middling draw and this card helps mitigate against "dead draws", at least a bit. I would say in particular Roland and Darrel will find this card quite useful.

The upgrade is better for investigators with low card draw, but you can't argue with a 4 XP savings for something that will work pretty well in most situations when you need a mid-game mulligan. Although the upgrade would be hilarious with Harvey Walters or any other Big Hand deck.